Formal Name
Informal Names
Epi-Super Group
Super or Mega Sequence
Epi-Group
Composite Sequence
Epi-Formation
Sequence Set
Epi-Member
Sequence (Depositional/TR/Genetic)
Epi-Compartment
System Tract
Epi-Unit
Parasequence, PAC, etc.
Epi-bed
Hierarchy of Epi-stratigraphic Units
However, there is a need for formal stratigraphic units
between bed and member !